Linux:Services

Docker

Checks

# List Docker containers 
docker ps

# List all Docker container IDs
docker ps -aq

# List logs for container 987sdh3qrasdhj
docker logs 987sdh3qrasdhj

# List RAM/CPU usage for Docker container asdlkasd67k
docker stats asdlkasd67k

Commands

# Enter the shell inside a docker container
docker exec -ti a89sd98sa7d /bin/bash

# Execute a command inside a container as a specific user
docker exec -it -u root asd87289hasdadz tail /var/log/nginx/access.log

# Restart docker container yogapants
docker restart yogapants

# Restart the 3 given containers
docker restart 79f71c7f4d91 bbb3d3f5c3b1 b0a3204d4098

# Restart all unhealthy Docker containers
for i in $(docker ps | grep unhealthy | awk '{print $1}'); do docker restart "$i"; done;

PowerDNS

• https://doc.powerdns.com/authoritative/index.html
• https://doc.powerdns.com/authoritative/manpages/pdns_server.1.html
• https://doc.powerdns.com/authoritative/manpages/pdnsutil.1.html

Checks

# List commands
pdns_server --help

# Check config and parse for errors
pdns_server --config=check

# List available commands 
pdnsutil --help

# Check config and parse for errors
pdnsutil --config=check

# List all available zones
pdnsutil list-all-zones

# List all domains in the primary zone
pdnsutil list-all-zones primary

# See zone information for a specific domain
pdnsutil show-zone mydomain.com
pdnsutil show-zone 77.5.10.in-addr.arpa

# Check zone for errors
pdnsutil check-zone mydomain.com

# List all created TSIG keys
pdnsutil list-tsig-keys

Commands

# Activate TSIG key for domain "myexample.com" in the primary zone
pdnsutil " myexample.com transfer primary

MAAS

Checks

Logs in either place:
/var/log/maas/
/var/snap/maas/common/log

# List status of MAAS services
maas status

# List MAAS commands
maas --help

# List available arguments for the init command
maas init --help